煤灰对圆管磨损及传热耦合的直接数值模拟

Direct Numerical Simulation About Erosion Study of Circular Tube by Coal Ash Particles With Considering the Coupling Heat Transfer

基于流体力学理论对不同工况下的煤灰颗粒冲刷槽道中圆管进行了直接数值模拟。流场和圆管之间的耦合采用内嵌边界技术结合多重直接力方法求解,颗粒轨道采用拉格朗日轨道模型求解并考虑颗粒与流体之间的双向耦合。采用新的磨损模型研究了磨损规律,计算并验证了该模型的正确性。并进一步通过内嵌边界技术结合多重热源方法研究了颗粒流中的传热。

The direct numerical simulation based on the theory of fluid mechanics under different working conditions of circular tube wear by coal ash particles in the groove way on. The inter-coupling between the flow and the circular tube was to adopt the immersed boundary technology in combination with multiple direct force method, calculating the particle track by using Lagrange orbit model and considering the inter-coupling between particles and fluid. The new erosion model had a research about the study wear rule, calculated and verified the correctness of the model. And further more, through the immersed boundary method combined with Multi-heat source process to have a study of heat transfer in the particle flow.